diff --git a/src/common/string.cpp b/src/common/string.cpp
index 211da2c5e3..4304d78ff7 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -1835,8 +1835,8 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
         // also, it may return an errno may be something like EILSEQ,
         // in which case we need to break out
         if ( (len >= 0 && len <= size)
-        // No EOVERFLOW on Windows nor Palm 6.0 nor OpenVMS
-#if !defined(__WXMSW__) && !defined(__WXPALMOS__) && !defined( __VMS )
+        // No EOVERFLOW on Windows nor Palm 6.0 nor OpenVMS nor MacOS (not X)
+#if !defined(__WXMSW__) && !defined(__WXPALMOS__) && !defined( __VMS ) && !(defined(__WXMAC__) && !defined(__WXMAC_OSX__))
             || errno != EOVERFLOW
 #endif
             )